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I accidentally removed the WHERE clause from my SQL query in a personal tool. Every row is now the same. I overwrote 206,000+ rows. I have no backup, I am stupid. (lemmy.world)

submitted 1 year ago* (last edited 1 year ago) by [email protected] to c/[email protected]

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"UPDATE table_name SET w = $1, x = $2, z = $4 WHERE y = $3 RETURNING *",

does not do the same as

"UPDATE table_name SET w = $1, x = $2, y = $3, z = $4 RETURNING *",

It's 2 am and my mind blanked out the WHERE, and just wanted the numbers neatly in order of 1234.

idiot.

FML.

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[–] [email protected] 4 points 1 year ago (2 children)

Unrelated, but use placeholders instead of interpolation right into the query.

See: Little Bobby Tables. https://xkcd.com/327/

[–] [email protected] 4 points 1 year ago (1 children)

That's what they're doing...

[–] [email protected] 1 points 1 year ago

If true, great. I've not run across a language / RDBMs library that uses numbered place holders over the standard ?, but I'm sure someone's done it.